No, the default is "off", but keep in mind that if a category has NO restrictions at all, then it is globally accessible.
Is there any trace of category of a topic into the topic URL?
reaon last edited by
Is it possible to determine which category does a topic belong to?
https://community.nodebb.org/topic/351/nodebb-wiki is for
https://community.nodebb.org/topic/1232/centering-imgs is for
but it seems no way to find their category via their URLs?!